Design and performance simulation of a new solar continuous solid adsorption refrigeration and heating hybrid system

Abstract

In this paper, the design of a new continuous solid adsorption refrigeration and heating hybrid system driven by solar energy was proposed, and its performance simulation and analysis were made under the normal working conditions. Some performance parameters of the system were obtained, and the effects of water mass in water tank on the system's COP cooling, COP heating etc. were discussed. The simulation indicated: the system could refrigerate continuously with such a design, and at the conditions of that the daily sun-radiation is 21.6 MJ, the mean ambient temperature is 29.9°C, the evaporating temperature is 5°C, the heat-collecting coefficient of upper bed η is 60%, and the heat-transfer coefficient between lower bed and ambient α is 2 W/m 2 K, by day a hybrid system of single combined bed could furnish 30 kg hot water of 47.8°C, and had a mean COP cooling of 0.18, a mean COP heating of 0.34, a continuous mean SCP a of 17.6 W/kg, a continuous mean SCP c of 87.8 W/m 2, and a continuous mean SHP c of 165.9 W/m 2; and at night it had a cooling capacity of 0.26 MJ/kg of adsorbent, and a cooling capacity of 1.3 MJ/m 2 of heat-collecting area.